ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Desktop.Layouts Namespace / LayoutView Class / SelectAllElements Method
Example Version

SelectAllElements Method (LayoutView)
Select all layout elements in a layout view. This method must be called on the MCT. Use QueuedTask.Run.
Syntax
public void SelectAllElements()
Exceptions
ExceptionDescription
This method or property must be called within the lambda passed to QueuedTask.Run.
Example
LayoutView_SelectAll
//Select all element on a layout.

await QueuedTask.Run(() => layoutView.SelectAllElements());
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.
See Also